Pulleys and Wheel and Axle Worksheet

Engineering lesson 14: Pulleys and the wheel and axle · Set 174 · 40 questions

Engineer's tip (Count the ropes): Fixed pulley: changes direction, effort = load. Pulley system: effort = load ÷ supporting rope sections; rope pulled = lift height × that number. Wheel and axle: MA = wheel radius ÷ axle radius; effort = load ÷ MA.

1. 1.🪝 A bucket weighing 380 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
2. 2.🪝 Fixed or movable pulley: which one makes you pull 2× rope? (a) a fixed pulley (b) a movable pulley
3. 3.True or false: a movable pulley only changes direction. (a) False (b) True
4. 4.🪝 A well winch has a handle (wheel) of radius 21 cm turning an axle of radius 3 cm. What is its mechanical advantage (MA)?
5. 5.🪝 Fixed or movable pulley: which one rises with the load? (a) a movable pulley (b) a fixed pulley
6. 6.True or false: a fixed pulley hangs on the rope loop. (a) True (b) False
7. 7.True or false: a movable pulley makes you pull 2× rope. (a) True (b) False
8. 8.True or false: a movable pulley hangs on the rope loop. (a) False (b) True
9. 9.🪝 A wheel and axle is a big wheel fixed to … (a) a flat ramp (b) a sharp wedge (c) a smaller rod (axle) (d) a loose rope
10. 10.🪝 A bucket weighing 460 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
11. 11.🪝 Fixed or movable pulley: which one needs effort = load? (a) a fixed pulley (b) a movable pulley
12. 12.🪝 Fixed or movable pulley: which one halves the effort? (a) a fixed pulley (b) a movable pulley
13. 13.🪝 A well winch has a handle (wheel) of radius 8 cm turning an axle of radius 2 cm. What is its mechanical advantage (MA)?
14. 14.True or false: a movable pulley needs effort = load. (a) False (b) True
15. 15.True or false: a movable pulley is on a flagpole top. (a) False (b) True
16. 16.🪝 Fixed or movable pulley: which one only changes direction? (a) a movable pulley (b) a fixed pulley
17. 17.🪝 A pulley system lifts a 420 N load with an effort of 140 N. What is its mechanical advantage (MA)?
18. 18.🪝 A bucket weighing 320 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
19. 19.🪝 A winch has a wheel of radius 28 cm and an axle of radius 4 cm. What effort on the wheel lifts a 630 N bucket on the axle, in newtons? (ideal)
20. 20.🪝 A load of 540 N hangs from a pulley system in which 2 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
21. 21.True or false: a movable pulley halves the effort. (a) True (b) False
22. 22.True or false: a movable pulley stays in one place. (a) False (b) True
23. 23.🪝 A bucket weighing 470 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
24. 24.🪝 Fixed or movable pulley: which one is on a flagpole top? (a) a fixed pulley (b) a movable pulley
25. 25.🪝 A pulley system has 1 rope section holding up the load. To lift the load by 5 m, how many metres of rope must you pull?
26. 26.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) gravity (d) the colour of rope
27. 27.True or false: a fixed pulley makes you pull 2× rope. (a) False (b) True
28. 28.True or false: a fixed pulley is on a flagpole top. (a) True (b) False
29. 29.🪝 A winch has a wheel of radius 3 cm and an axle of radius 1 cm. What effort on the wheel lifts a 180 N bucket on the axle, in newtons? (ideal)
30. 30.🪝 Fixed or movable pulley: which one stays in one place? (a) a movable pulley (b) a fixed pulley
31. 31.🪝 More rope sections holding a load means … (a) less effort needed (b) no change (c) more effort needed (d) the load floats
32. 32.🪝 A bucket weighing 30 N is lifted with a single fixed pulley at the top of a well. What effort is needed, in newtons? (ideal pulley, no friction)
33. 33.True or false: a fixed pulley halves the effort. (a) True (b) False
34. 34.🪝 A winch has a wheel of radius 4 cm and an axle of radius 2 cm. What effort on the wheel lifts a 220 N bucket on the axle, in newtons? (ideal)
35. 35.🪝 A load of 120 N hangs from a pulley system in which 4 rope sections hold up the load. What effort is needed, in newtons? (ideal pulleys)
36. 36.🪝 A winch has a wheel of radius 16 cm and an axle of radius 2 cm. What effort on the wheel lifts a 1440 N bucket on the axle, in newtons? (ideal)
37. 37.True or false: a fixed pulley rises with the load. (a) False (b) True
38. 38.True or false: a fixed pulley stays in one place. (a) False (b) True
39. 39.🪝 A winch has a wheel of radius 5 cm and an axle of radius 1 cm. What effort on the wheel lifts a 350 N bucket on the axle, in newtons? (ideal)
40. 40.🪝 A well winch has a handle (wheel) of radius 4 cm turning an axle of radius 1 cm. What is its mechanical advantage (MA)?

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